Base on stories like oily man or better known as ‘Orang Minyak’, these Oily Man is no other than an ordinary poeple who have been praticing black Magic. What I gathered is that, they have mission to accomplise. They have certain targets in order to achieve what they have been practicing. “Black Magic”. Commonly, they would do things like rape, molest or whatever evil kind which are against us in order to satisfy the evil spirit which are controlling them during their probation period. Their purposes to have their whole body oily is to scare people. Thinking that, it would be another kind of ghost or whatever evil spririt. Infact these Oily Man has no special power or Magic at this point. I have heard of cases in the 70’s where these Oily Man was trapped and caught by the villagers and were badly beaten.